H18.71 is a "category code," which means it's non-billable. Billable codes require more specificity. Use the list below to navigate to codes that are more specific:
10
H18.711
Corneal ectasia, right eye
Billable
10
H18.712
Corneal ectasia, left eye
Billable
10
H18.713
Corneal ectasia, bilateral
Billable
10
H18.719
Corneal ectasia, unspecified eye
Billable